Smolke, Jennifer and Lapointe, Simon and Paxton, Laurel and Blanquart, Guillaume and Carbone, Francesco and Fincham, Adam M. and Egolfopoulos, Fokion N. (2017) Experimental and numerical studies of fuel and hydrodynamic effects on piloted turbulent premixed jet flames. Proceedings of the Combustion Institute, 36 (2). pp. 1877-1884. ISSN 1540-7489. https://resolver.caltech.edu/CaltechAUTHORS:20170407-120853660
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Abstract
An experimental and numerical investigation of fuel and hydrodynamic effects is performed on piloted premixed jet flames. The investigation is carried out at a constant laminar flame speed, varying heat losses, jet Reynolds number, fuel molecular weight, and fuel chemical classification. Large Eddy Simulations are performed in an attempt to reproduce the behaviors observed experimentally. Simulations are compared against well-characterized boundary conditions, well-resolved two-dimensional velocity fields from particle image velocimetry, and line-of-sight CH⁎ profiles. Experimental results indicate that small amounts of heat losses may play a significant role on the jet reactivity as the flame heights scale with the heat loss from the jet. However, differences between flames with different fuels can still be seen in the absence of heat losses and these differences are magnified at higher Reynolds numbers. Particularly, methane flames are consistently taller and ethylene flames consistently shorter while other fuels present approximately the same flame height. LES reproduce the experimentally observed trends in global flame heights (effects of heat losses and Reynolds number) but some of the differences between fuels are not captured.
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| Additional Information: | © 2016 The Combustion Institute. Published by Elsevier Inc. Received 4 December 2015, Revised 27 May 2016, Accepted 29 July 2016, Available online 6 October 2016. The authors gratefully acknowledge funding from Air Force Office of Scientific Research (FA9550-12-1-0472 and FA9550-12-1-0144) under supervision of Dr. Chiping Li. The work at USC was supported by the NSF under Grant No. CBET-1512214. | |||||||||
| Group: | GALCIT | |||||||||
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| Subject Keywords: | Premixed turbulence; Jet flames; PIV; LES; Hydrocarbon fuels | |||||||||
| Issue or Number: | 2 | |||||||||
| Record Number: | CaltechAUTHORS:20170407-120853660 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20170407-120853660 | |||||||||
| Official Citation: | Jennifer Smolke, Simon Lapointe, Laurel Paxton, Guillaume Blanquart, Francesco Carbone, Adam M. Fincham, Fokion N. Egolfopoulos, Experimental and numerical studies of fuel and hydrodynamic effects on piloted turbulent premixed jet flames, Proceedings of the Combustion Institute, Volume 36, Issue 2, 2017, Pages 1877-1884, ISSN 1540-7489, http://doi.org/10.1016/j.proci.2016.07.127. (http://www.sciencedirect.com/science/article/pii/S1540748916303856) | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 75842 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | George Porter | |||||||||
| Deposited On: | 07 Apr 2017 20:05 | |||||||||
| Last Modified: | 03 Oct 2019 16:54 |
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